October 9, 1891.J 



SCIENCE. 



209 



of the sciPDce treated, but many methods of preparatinn of the 

 most inipoitaiit derivatives of the ditferent classes of bodies are 

 given. The new edition contains additions to tlie methods of 

 analysis described in the first, and natui-ally due references to the 

 recent advances in chemical theory. The section on carboliydrates 

 has been entirely rewritten and brought into agreeinent with the 

 present vievcp. Professors Ostwald, von Baeyer, and Emil Fischer 

 aided the author in the presentation of the material drawn from 

 their special fields of investigation. The book will be to some ex- 

 tent available as a text-book, but its considerable size will make it 

 more useful as a guide in the laboratory and as a volume of refer- 

 ence to the advanced student. 



— In tbe Review of Reviews each month the pages of small print 

 at the end of the periodical contain classified lists of all the new 

 books that have lately appeared, with bits of running comment on 

 them ; lists of the contents of all the principal periodicals of Amer- 

 ica, England, France, Germany, Italy, Belgium, and the Scandi- 



navian countries; and a complete index, whioh under one alphabet 

 lists the important articles that have appeared in the previous 

 month in every important periodical published in the English lan- 

 guage. 



— The opening article of The Century for October is the closing 

 one of Mr. Kennan's series, and is entitled "My Last Days in 

 Siberia " He describes his experiences among the Kachinski 

 Taters and the political exiles of Minusinsk, and with the " plague- 

 guard " or quarantine, and narrates the journey by way of Tobolsk 

 and Tiumen to St. Petersburg. The promised article by Hiram S. 

 Maxim, the inventor, on "Aerial Navigation" appears in this 

 number, and considers particularly the question of the power re- 

 quired for aviation. Mr. Maxim discusses the philosophy of the sub' 

 jeot and relates the progress of his experiments at Kent, England, 

 which are illustrated with drawings of the machine employed. He 

 also adds a forecast of the possible future uses of the new mode of 

 locomotion. 



Alonic 



A most excellent and agree- 

 able tonic and appetizer. It 

 nourishes and invigorates the 

 tired brain and body, imparts re 

 newed energy and vitality, and 

 enlivens the functions. 



Dr. Epheaim Bateman, Cedarville, N. J., 

 says: 



" I have used it for several years, not only 

 in my practice, but in. my own individual 

 case, and consider it under all circumstances 

 one of the best nerve tonics that we possess. 

 For mental exhaustion or overwork it gives 

 renewed strength and vigor to the entire 

 system . ' ' 



Descriptive pamphlet free. 



Rumford Chemical Works, Providence, R. I. 



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